Please help ASAP! I need help on this since I dont know what to do. thank you.

The following air conditioning options are available to meet the cooling needs of each motel room: a ground-source heat pump system with an EER of 14, a window air conditioning unit with an EER of 9.5, and an air-source heat pump mounted to the wall with an EER of 11. a. Based on these EER values, which option is the most energy efficient? [2 points] b. How much energy in Btu/hour would be saved per watt of electricity used compared to the least efficient option? [ 6 points] c. When cooled, each of the 38 hotel rooms will need 8000Btu/ hour of cooling. How much total electricity will be saved by choosing the most efficient air conditioning option compared to the least efficient option, across all 38 hotel rooms, if 4200 hours of cooling are needed per year? [ 8 points]